Ddx17通过调节心肌细胞中的线粒体动力学来缓解败血症诱导的心肌病
Ya-Ting Jiang1, Li-Ran Su2, Fang-Jing Ni2,3
1Emergency Department, Ningbo No. 2 Hospital, Ningbo, China.
Clinical and experimental pharmacology & physiology
|February 8, 2026
概括
死亡盒酶17 (Ddx17) 在败血症期间保护心脏功能. 这项研究表明Ddx17可以保持线粒体的完整性,减少氧化应激,防止细胞死亡,为败血症诱导的心肌病提供潜在的治疗点.
科学领域:
- 心脏病学 心脏病学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 败血症诱导心肌病 (SICM) 是败血症的一个严重并发症.
- 线粒体功能障碍是SICM的一个关键因素.
- 在SICM中DEAD-box酶17 (Ddx17) 的作用尚不清楚.
研究的目的:
- 调查Ddx17在败血症引起的心肌病中的作用.
- 探索Ddx17在败血症期间影响心脏功能的潜在机制.
主要方法:
- 产生了心肌细胞特异性Ddx17敲击和过度表达的小鼠.
- 已建立的败血症模型使用结和穿孔.
- 在体外使用免疫沉和双露西法酶测定验证的机械学发现.
主要成果:
- 在败血性心脏组织和用LPS治疗的心肌细胞中,Ddx17的表达减少.
- Ddx17 knockdown 加剧了线粒体功能障碍和细胞死亡.
- Ddx17过度表达改善了心脏功能,减少了氧化应激,并预防了败血症小鼠的亡.
- Ddx17与STAT3相互作用,调节线粒体动力学 (动胺相关蛋白1和线粒素1).
结论:
- Ddx17在败血症引起的心肌病中起着保护作用.
- Ddx17保护线粒体完整性和心肌细胞平衡.
- Ddx17代表了感染性心脏功能障碍的潜在治疗标.
相关概念视频
Cardiomyopathy II: Dilated Cardiomyopathy
588
Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
588
Cardiomyopathy III: Hypertrophic Cardiomyopathy
509
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
509
Cardiomyopathy IV: Restrictive Cardiomyopathy
580
Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
580
Animal Mitochondrial Genetics
9.3K
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
9.3K
Cardiomyopathy V: Interprofessional Care
465
Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
465
Cardiomyopathy I: Introduction and Classification
615
Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
615


